Summary
The view pg_timezone_abbrevs provides a list of time zone abbreviations that are currently recognized by the datetime input routines. The contents of this view change when the timezone or timezone_abbreviations run-time parameters are modified.
(Description quoted from the official PostgreSQL documentation.)
Columns
The pg_timezone_abbrevs system view exposes the following columns (names, types and descriptions are taken verbatim from the PostgreSQL documentation):
abbrevtext
Time zone abbreviationutc_offsetinterval
Offset from UTC (positive means east of Greenwich)is_dstbool
True if this is a daylight-savings abbreviation
Version applicability
Present in PostgreSQL 17, 18, 19 (verified against each release’s documentation). This is a long-standing system object that also exists in earlier PostgreSQL releases.
Related & references
Reference: PostgreSQL documentation — pg_timezone_abbrevs.